diff --git a/app/Entities/Invoices/Invoice.php b/app/Entities/Invoices/Invoice.php
index b6a44bb..6120b1d 100755
--- a/app/Entities/Invoices/Invoice.php
+++ b/app/Entities/Invoices/Invoice.php
@@ -13,26 +13,62 @@ use Illuminate\Database\Eloquent\Model;
  */
 class Invoice extends Model
 {
+    /**
+     * The attributes that aren't mass assignable.
+     *
+     * @var array
+     */
     protected $guarded = ['id', 'created_at', 'updated_at'];
 
+    /**
+     * The attributes that should be cast to native types.
+     *
+     * @var array
+     */
     protected $casts = ['items' => 'array'];
+
+    /**
+     * The number of models to return for pagination.
+     *
+     * @var int
+     */
     protected $perPage = 25;
 
+    /**
+     * Get the route key for the model.
+     *
+     * @return string
+     */
     public function getRouteKeyName()
     {
         return 'number';
     }
 
+    /**
+     * Invoice belongs to project.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
     public function project()
     {
         return $this->belongsTo(Project::class);
     }
 
+    /**
+     * Invoice belongs to creator (user).
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
     public function creator()
     {
         return $this->belongsTo(User::class);
     }
 
+    /**
+     * Generate invoice (incrementing) number.
+     *
+     * @return string
+     */
     public function generateNewNumber()
     {
         $prefix = date('ym');
@@ -49,13 +85,21 @@ class Invoice extends Model
         return $prefix.'001';
     }
 
-    public function getItemsCountAttribute($value)
+    /**
+     * Get invoice items count attribute.
+     *
+     * @return int
+     */
+    public function getItemsCountAttribute()
     {
-        $pcsCount = 0;
-
         return count($this->items);
     }
 
+    /**
+     * Get invoice number in html link format.
+     *
+     * @return \Illuminate\Support\HtmlString
+     */
     public function numberLink()
     {
         return link_to_route('invoices.show', $this->number, [$this->number], [
diff --git a/app/Entities/Options/Option.php b/app/Entities/Options/Option.php
index ba5004b..7a65f3f 100755
--- a/app/Entities/Options/Option.php
+++ b/app/Entities/Options/Option.php
@@ -6,7 +6,24 @@ use Illuminate\Database\Eloquent\Model;
 
 class Option extends Model
 {
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array
+     */
     protected $fillable = ['key', 'value'];
+
+    /**
+     * The table associated with the model.
+     *
+     * @var string
+     */
     protected $table = 'site_options';
+
+    /**
+     * Indicates if the model should be timestamped.
+     *
+     * @var bool
+     */
     public $timestamps = false;
 }
diff --git a/app/Entities/Partners/Customer.php b/app/Entities/Partners/Customer.php
index 0c0dc9f..72ec4fc 100644
--- a/app/Entities/Partners/Customer.php
+++ b/app/Entities/Partners/Customer.php
@@ -6,28 +6,58 @@ use Illuminate\Database\Eloquent\Model;
 
 class Customer extends Model
 {
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array
+     */
     protected $fillable = ['name', 'email', 'phone', 'pic', 'address', 'website', 'notes', 'is_active'];
 
+    /**
+     * Customer has many projects.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\HasMany
+     */
     public function projects()
     {
         return $this->hasMany('App\Entities\Projects\Project');
     }
 
+    /**
+     * Customer morph many payments.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\MorphMany
+     */
     public function payments()
     {
         return $this->morphMany('App\Entities\Payments\Payment', 'partner');
     }
 
+    /**
+     * Customer has many subscriptions.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\HasMany
+     */
     public function subscriptions()
     {
         return $this->hasMany('App\Entities\Subscriptions\Subscription');
     }
 
+    /**
+     * Customer has many invoices through their projects.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\HasManyThrough
+     */
     public function invoices()
     {
         return $this->hasManyThrough('App\Entities\Invoices\Invoice', 'App\Entities\Projects\Project');
     }
 
+    /**
+     * Get customer name in html link format.
+     *
+     * @return \Illuminate\Support\HtmlString
+     */
     public function nameLink()
     {
         return link_to_route('customers.show', $this->name, [$this->id], [
@@ -38,11 +68,21 @@ class Customer extends Model
         ]);
     }
 
+    /**
+     * Get customr status attribute.
+     *
+     * @return string
+     */
     public function getStatusAttribute()
     {
         return $this->is_active == 1 ? trans('app.active') : trans('app.in_active');
     }
 
+    /**
+     * Get customr status label attribute.
+     *
+     * @return string
+     */
     public function getStatusLabelAttribute()
     {
         $color = $this->is_active == 1 ? ' style="background-color: #337ab7"' : '';